Firestone Polyiso Roof Insulation R Value

It represents the actual r value that the polyiso insulation will provide while in service.

Firestone polyiso roof insulation r value. In q4 2013 jm will modify its packaging to reflect lttr values by both test methods. This commitment has resulted in the development of firestone insulation boards and firestone cover boards. The net result is that the r value of the insulation will decrease slightly over time. Understanding r value thursday december 13 2018 what does r value mean.

Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof. Polyiso insulation thickness r value chart. As an example a 1 board label will include information from lttr s770 03. Jm sheathing r values will not change.

Firestone polyiso insulation. The r value of your insulation can optimize your energy savings in any zone. Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature. Polyiso is unique in that the r value increases with the thickness of the foam so three inches of polyiso has a higher r value per inch than two inches.

Firestone isogard polyiso insulation goes even further and was the first product on the market to meet both astm c1289 required and recommended thermal performance values. Jm s wall sheathing line ap foil and ci max are not governed by lttr test methods and have different r value measurement standards. In 2003 the polyiso industry introduced the concept of long term thermal resistance or lttr. Lttr is a 15 year time weighted average of the foam s r value.

Firestone has been committed to offering a complete line of high performing roofing solutions as individual as your building. Fm approved subject to the conditions of approval as a roof insulation when installed as shown in the current edition of the factory mutual research approvals guide. Polyiso roof insulation is the most widely used product for low slope commercial roofing and provides a high r value that helps meet today s energy code requirements without the added thickness or weight of other products. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness.

Benefits of energyguard polyiso roof insulation include. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. More projects select polyiso roof insulation for both new and roof replacement systems than any other insulation product.